The art or science of conveying information through the use of display media, such as graphs, letters, lines, drawings, and pictures.
Note: Graphics includes the transmission of coded images such as facsimile.

In computer science and technology, the special hardware within the computer optimized for the display of real-time 3D graphics.

A binary code in which consecutive decimal numbers are represented by binary expressions that differ in the state of one, and only one, one bit. Synonym reflected code.

An optical pattern consisting of discrete steps or shades of gray between black and white.

A circle defined by the intersection of the surface of the Earth and any plane that passes through the center of the Earth.
Note: On the idealized surface of the Earth, the shortest distance between two points lies along a great circle.

Synonym Greenwich Mean Time (GMT). Obsolete term. See Coordinated Universal Time.

Mean solar time at the meridian of Greenwich, England, formerly used as a basis for standard time throughout the world. Obsolete term. Synonym Greenwich Civil Time. See Coordinated Universal Time.

1. An electrical connection to earth through an earth-electrode subsystem.
2. In an electrical circuit, a common return path that usually (a) is connected to an earth-electrode subsystem and (b) is extended throughout a facility via a facility ground system consisting of the signal reference subsystem, the fault protection subsystem, and the lightning protection subsystem.
3. In an electrical circuit,… (Read More →)

The dissipation of rf energy by the earth.

The electrical parameters of earth, such as conductivity, permittivity, and magnetic permeability.
Note 1: The values of these parameters vary with the local chemical composition and density of the earth.
Note 2: For a propagating electromagnetic wave, such as a surface wave propagating along the surface of the Earth, these parameters vary with frequency and direction.